SCHEDULE 13G 0002053105 XXXXXXXX LIVE Class A Common Stock, par value $0.01 per share 01/30/2025 0002029118 Infinity Natural Resources, Inc. 456941103 2605 Cranberry Square Morgantown WV 26508 Rule 13d-1(d) PEI INR Holdings, L.P. DE 0 28894732 0 28894732 28894732 N 65.5 PN (1) Represents 28,894,732 shares of Class A common stock, par value $0.01 per share ("Class A common stock"), of the Issuer issuable in exchange for of an equivalent number of common units ("Common Units") of Infinity Natural Resources, LLC, a subsidiary of the Issuer ("INR Holdings"), held by the Reporting Persons in the aggregate on a one-for-one basis (together with the cancellation for no consideration of an equal number of shares of Class B common stock, par value $0.01 per share ("Class B common stock"), of the Issuer held by the Reporting Persons). (2) Calculated assuming 44,132,232 shares of Class A common stock outstanding based upon (i) 15,237,500 shares of Class A common stock outstanding as of February 3, 2025, as reported in the Issuer's Final Prospectus filed with the Securities and Exchange Commission on February 3, 2025, as increased by (ii) 28,894,732 shares of Class A common stock issuable in respect of an equivalent number of Common Units and shares of Class B common stock held in the aggregate by the Reporting Persons. Pearl Energy Investments, L.P. DE 0 28894732 0 28894732 28894732 N 65.5 PN (1) Represents 28,894,732 shares of Class A common stock of the Issuer issuable in exchange for of an equivalent number of Common Units of INR Holdings held by the Reporting Persons in the aggregate on a one-for-one basis (together with the cancellation for no consideration of an equal number of shares of Class B common stock of the Issuer held by the Reporting Persons). (2) Calculated assuming 44,132,232 shares of Class A common stock outstanding based upon (i) 15,237,500 shares of Class A common stock outstanding as of February 3, 2025, as reported on the in the Issuer's Final Prospectus filed with the Securities and Exchange Commission on February 3, 2025, as increased by (ii) 28,894,732 shares of Class A common stock issuable in respect of an equivalent number of Common Units and shares of Class B common stock held in the aggregate by the Reporting Persons. Pearl Energy Investments III, L.P. DE 0 28894732 0 28894732 28894732 N 65.5 PN (1) Represents 28,894,732 shares of Class A common stock of the Issuer issuable in exchange for of an equivalent number of Common Units of INR Holdings held by the Reporting Persons in the aggregate on a one-for-one basis (together with the cancellation for no consideration of an equal number of shares of Class B common stock of the Issuer held by the Reporting Persons). (2) Calculated assuming 44,132,232 shares of Class A common stock outstanding based upon (i) 15,237,500 shares of Class A common stock outstanding as of February 3, 2025, as reported on the in the Issuer's Final Prospectus filed with the Securities and Exchange Commission on February 3, 2025, as increased by (ii) 28,894,732 shares of Class A common stock issuable in respect of an equivalent number of Common Units and shares of Class B common stock held in the aggregate by the Reporting Persons. PEI INR Co-Invest-B, Corp. DE 0 28894732 0 28894732 28894732 N 65.5 CO (1) Represents 28,894,732 shares of Class A common stock of the Issuer issuable in exchange for of an equivalent number of Common Units of INR Holdings held by the Reporting Persons in the aggregate on a one-for-one basis (together with the cancellation for no consideration of an equal number of shares of Class B common stock of the Issuer held by the Reporting Persons). (2) Calculated assuming 44,132,232 shares of Class A common stock outstanding based upon (i) 15,237,500 shares of Class A common stock outstanding as of February 3, 2025, as reported on the in the Issuer's Final Prospectus filed with the Securities and Exchange Commission on February 3, 2025, as increased by (ii) 28,894,732 shares of Class A common stock issuable in respect of an equivalent number of Common Units and shares of Class B common stock held in the aggregate by the Reporting Persons. PEI Infinity-S, LP DE 0 28894732 0 28894732 28894732 N 65.5 PN (1) Represents 28,894,732 shares of Class A common stock of the Issuer issuable in exchange for of an equivalent number of Common Units of INR Holdings held by the Reporting Persons in the aggregate on a one-for-one basis (together with the cancellation for no consideration of an equal number of shares of Class B common stock of the Issuer held by the Reporting Persons). (2) Calculated assuming 44,132,232 shares of Class A common stock outstanding based upon (i) 15,237,500 shares of Class A common stock outstanding as of February 3, 2025, as reported on the in the Issuer's Final Prospectus filed with the Securities and Exchange Commission on February 3, 2025, as increased by (ii) 28,894,732 shares of Class A common stock issuable in respect of an equivalent number of Common Units and shares of Class B common stock held in the aggregate by the Reporting Persons. William J. Quinn DE 0 28894732 0 28894732 28894732 N 65.5 IN (1) Represents 28,894,732 shares of Class A common stock of the Issuer issuable in exchange for of an equivalent number of Common Units of INR Holdings held by the Reporting Persons in the aggregate on a one-for-one basis (together with the cancellation for no consideration of an equal number of shares of Class B common stock of the Issuer held by the Reporting Persons). (2) Calculated assuming 44,132,232 shares of Class A common stock outstanding based upon (i) 15,237,500 shares of Class A common stock outstanding as of February 3, 2025, as reported on the in the Issuer's Final Prospectus filed with the Securities and Exchange Commission on February 3, 2025, as increased by (ii) 28,894,732 shares of Class A common stock issuable in respect of an equivalent number of Common Units and shares of Class B common stock held in the aggregate by the Reporting Persons. Pearl Energy Investment III UGP, LLC DE 0 28894732 0 28894732 28894732 N 65.5 OO (1) Represents 28,894,732 shares of Class A common stock of the Issuer issuable in exchange for of an equivalent number of Common Units of INR Holdings held by the Reporting Persons in the aggregate on a one-for-one basis (together with the cancellation for no consideration of an equal number of shares of Class B common stock of the Issuer held by the Reporting Persons). (2) Calculated assuming 44,132,232 shares of Class A common stock outstanding based upon (i) 15,237,500 shares of Class A common stock outstanding as of February 3, 2025, as reported on the in the Issuer's Final Prospectus filed with the Securities and Exchange Commission on February 3, 2025, as increased by (ii) 28,894,732 shares of Class A common stock issuable in respect of an equivalent number of Common Units and shares of Class B common stock held in the aggregate by the Reporting Persons. Pearl Energy Investment UGP, LLC DE 0 28894732 0 28894732 28894732 N 65.5 OO (1) Represents 28,894,732 shares of Class A common stock of the Issuer issuable in exchange for of an equivalent number of Common Units of INR Holdings held by the Reporting Persons in the aggregate on a one-for-one basis (together with the cancellation for no consideration of an equal number of shares of Class B common stock of the Issuer held by the Reporting Persons). (2) Calculated assuming 44,132,232 shares of Class A common stock outstanding based upon (i) 15,237,500 shares of Class A common stock outstanding as of February 3, 2025, as reported on the in the Issuer's Final Prospectus filed with the Securities and Exchange Commission on February 3, 2025, as increased by (ii) 28,894,732 shares of Class A common stock issuable in respect of an equivalent number of Common Units and shares of Class B common stock held in the aggregate by the Reporting Persons. Infinity Natural Resources, Inc. 2605 Cranberry Square, Morgantown, West Virginia 26508 This statement is filed by the entities and persons listed below, all of whom together are referred to herein as the "Reporting Persons" and each, a "Reporting Person": (i) PEI INR Holdings, L.P., a Delaware limited partnership ("PEI INR Holdings"); (ii) Pearl Energy Investments, L.P., a Delaware limited partnership ("Pearl LP"); (iii) Pearl Energy Investments III, L.P., a Delaware limited partnership ("Pearl III LP"); (iv) Pearl INR Co-Invest B, Corp., a Delaware Corporation ("Pearl INR Co-Invest"); (v) Pearl Infinity-S, LP, a Delaware limited partnership ("Pearl S LP"); (vi) Pearl Energy Investment III UGP, LLC, a Delaware limited liability company ("Pearl III UGP"); (vii) Pearl Energy Investment UGP, LLC, a Delaware limited liability company ("Pearl UGP"); and (viii) William J. Quinn, a United States citizen. The address of the principal business office of each Reporting Person is: 2100 McKinney Ave Suite 1675 Dallas, Texas 75201 See responses to Item 4 on each of the cover pages. Y See responses to Item 9 on each of the cover pages. The shares reported herein are directly held by PEI INR Holdings, Pearl LP, Pearl III LP, Pearl S LP, and Pearl INR Co-Invest (collectively, the "Pearl Funds"). Pearl III GP is the general partner of PEI INR Holdings, Pearl III LP, Pearl S LP and PEI INR A (as defined below). Pearl Energy Investment III UGP, LLC ("Pearl III UGP") is the general partner of Pearl III GP. Pearl Energy Investment GP, L.P. ("Pearl GP") is the general partner of Pearl LP. Pearl UGP is the general partner of Pearl GP. PEI INR Holdings-A, L.P. ("PEI INR A") is the sole shareholder of PEI INR Co-Invest. The Pearl Funds are controlled by William J. Quinn, the founder and managing partner of Pearl Energy Investments, who is the managing member of Pearl UGP and Pearl III UGP, the respective ultimate general partners of the Pearl Funds. Information with respect to each Reporting Person is given solely by such Reporting Person, and no Reporting Person assumes responsibility for the accuracy or completeness of the information furnished by another Reporting Person. Pursuant to Rule 13d-4 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), the Reporting Persons expressly declare that the filing of this schedule shall not be construed as an admission that any such person is, for the purposes of Section 13(d) and/or Section 13(g) of the Exchange Act or otherwise, the beneficial owner of any securities covered by this schedule held by any other person, and such beneficial ownership is expressly disclaimed. See responses to Item 11 on each of the cover pages. See responses to Item 5 on each of the cover pages. See responses to Item 6 on each of the cover pages. See responses to Item 7 on each of the cover pages. See responses to Item 8 on each of the cover pages. Y Y Y Y Y Y PEI INR Holdings, L.P. /s/ William J. Quinn 03/14/2025 Pearl Energy Investments, L.P. /s/ William J. Quinn 03/14/2025 Pearl Energy Investments III, L.P. /s/ William J. Quinn 03/14/2025 PEI INR Co-Invest-B, Corp. /s/ William J. Quinn 03/14/2025 PEI Infinity-S, LP /s/ William J. Quinn 03/14/2025 William J. Quinn /s/ William J. Quinn 03/14/2025 Pearl Energy Investment III UGP, LLC William J. Quinn 03/14/2025 Pearl Energy Investment UGP, LLC William J. Quinn 03/14/2025 (i) Pearl Energy Investment III GP, L.P. is the general partner of PEI INR Holdings, L.P., Pearl Energy Investments III, L.P., Pearl Infinity-S, LP and PEI INR Holdings-A, L.P. Pearl Energy Investment III UGP, LLC is the general partner of Pearl Energy Investment III GP, L.P. (ii) Pearl Energy Investment GP, L.P. is the general partner of Pearl Energy Investments, L.P.. Pearl Energy Investment UGP, LLC is the general partner of Pearl Energy Investment GP, L.P. (iii) PEI INR Holdings-A, L.P. is the sole shareholder of PEI INR Co-Invest-B, Corp. Exhibit 1 Joint Filing Agreement, dated as of March 14, 2025, by and among the Reporting Persons (filed herewith).